Perhaps until the train disruption he has no need to use the bus I use the bus because it stops near my home and goes to the Old Steine and Village Way so no or very little walking involved
I use this bus every game and would say do not wait on the A27 as it will be full by the time it gets there I always get the first bus from near the away end in Village way then change at Lewes Rd garage if it is a 23 or 50 to get into town. All buses go to Old Steine when you can get on...